In-Frame rebuild time for this 1966 4020 Diesel Powershift. Block R33180. After cleaning out the cylinder wells, there is some pitting at the o-ring seat. This is #5 cylinder. 2,3,4 are showing the beginning signs of this pitting.
I am the second owner of this, the first being my father in-law. Estimated hrs (clocked stopped at 8600 in 71 or 72) >20k. No major rebuilds or anything. There was a healthy buildup of sludge in the bottom of the wells. No obvious weephole stains/leaks or general coolant leaks for the time I have had it (250 hrs over 12 years).
Some posts here and there say that a JBWeld fix is the way to go. Others would send it to the machine shop. Get a new block or take a chance on putting it back together again round out the option tree.
I appeal to the great Deere engine rebuilders and eye-ballers here for your advice on the most prudent path forward.
Thx